I could see both sides of that - using a refill longer than the Parker G2 standard might pose issues I couldn't even conceive of, but, then, the additional length might be more pleasing to the eye: more streamlined, less stubby. From my perspective, those are quibbles. One should appreciate what an artist or craftsman creates as is, rather than suggesting "improvements." If Cheryl Tiegs (to pick someone in my age bracket) wants to park her slippers under my bed, I'd find room!

The other factor is the ring on the clip as that makes the decision of how thick the top will be. From there it tapers down to the 9mm st the nose cone.Cheryl Tiegs is a name that I do remember fondly lol